145283731 has 4 divisors (see below), whose sum is σ = 146014000. Its totient is φ = 144553464.

The previous prime is 145283687. The next prime is 145283737. The reversal of 145283731 is 137382541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137382541 = 29 ⋅4737329.

It is a cyclic number.

It is not a de Polignac number, because 145283731 - 2⁷ = 145283603 is a prime.

It is a super-2 number, since 2×145283731² = 42214724986560722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145283737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364836 + ... + 365233.

It is an arithmetic number, because the mean of its divisors is an integer number (36503500).

Almost surely, 2^145283731 is an apocalyptic number.

145283731 is a deficient number, since it is larger than the sum of its proper divisors (730269).

145283731 is an equidigital number, since it uses as much as digits as its factorization.

145283731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730268.

The product of its digits is 20160, while the sum is 34.

The square root of 145283731 is about 12053.3701096415. The cubic root of 145283731 is about 525.7012319713.

The spelling of 145283731 in words is "one hundred forty-five million, two hundred eighty-three thousand, seven hundred thirty-one".